1. Department of Physics
2. University of Texas at Arlington
3. Arlington
4. USA
5. Laboratory on High-Strength Structural Materials
6. Central South University
7. Changsha 410083
8. P. R. China
9. School of Materials Science and Engineering
10. Research Center for Analytical Sciences
11. Department of Chemistry
12. College of Sciences
13. Northeastern University
14. Shenyang 110819